Polyester resin powder coatings are welcomed by people because of its four significant characteristics of high efficiency,environmental protection,high performance and economy,but its application in certain fields is limited due to their leveling performance is slightly inferior to solvent-based coatings.Therefore,the influence of factors such as acid value,viscosity,acidolytic agent type and additives on the leveling performance of β-hydroxyalkylamide powder coatings were discussed.